EP0392020A4 - Magnetooptical recording apparatus - Google Patents

Magnetooptical recording apparatus

Info

Publication number
EP0392020A4
EP0392020A4 EP19890907287 EP89907287A EP0392020A4 EP 0392020 A4 EP0392020 A4 EP 0392020A4 EP 19890907287 EP19890907287 EP 19890907287 EP 89907287 A EP89907287 A EP 89907287A EP 0392020 A4 EP0392020 A4 EP 0392020A4
Authority
EP
European Patent Office
Prior art keywords
sck
timing
light
clock signal
reference clock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890907287
Other versions
EP0392020B1 (en
EP0392020A1 (en
Inventor
Tetsu Watanabe
Tetsuji Kawashima
Goro Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to EP93111526A priority Critical patent/EP0569054B1/en
Publication of EP0392020A1 publication Critical patent/EP0392020A1/en
Publication of EP0392020A4 publication Critical patent/EP0392020A4/en
Application granted granted Critical
Publication of EP0392020B1 publication Critical patent/EP0392020B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1406—Reducing the influence of the temperature
    • G11B33/144—Reducing the influence of the temperature by detection, control, regulation of the temperature
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/1051—Recording by modulating both the magnetic field and the light beam at the transducers
    • G11B11/10513—Recording by modulating both the magnetic field and the light beam at the transducers one of the light beam or the magnetic field being modulated by data and the other by a clock or frequency generator
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/1053—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10595—Control of operating function
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/14—Control of operating function, e.g. switching from recording to reproducing by sensing movement or position of head, e.g. means moving in correspondence with head movements

Landscapes

  • Optical Head (AREA)
  • Lock And Its Accessories (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

In a magneto-optical recording apparatus, light spots are successively formed on a magneto-optical disc (2) at a timing of a predetermined reference clock signal (SCK), and record data are magnetically recorded onto the disc (2) by applying a predetermined modulation magnetic field (HM) of which the polarity is inverted depending on the record data in synchronism with the reference clock signal (SCK). At least one of the timing of irradiating a light beam (LA1) forming the light spots, the light volume of the beam or the irradiation time is controlled depending upon the temperature of the disc (2) and/or the scanning position of the light spot, in order to form a pit (P) at a correct position relative to the timing of the reference clock signal (SCK). <IMAGE>
EP89907287A 1988-06-24 1989-06-19 Magnetooptical recording apparatus Expired - Lifetime EP0392020B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93111526A EP0569054B1 (en) 1988-06-24 1989-06-19 Magneto-optical recording apparatus

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP15772988 1988-06-24
JP157729/88 1988-06-24
JP263503/88 1988-10-18
JP63263503A JP2847722B2 (en) 1988-06-24 1988-10-18 Magneto-optical recording device
PCT/JP1989/000612 WO1989012889A1 (en) 1988-06-24 1989-06-19 Magnetooptical recording apparatus

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP93111526A Division EP0569054B1 (en) 1988-06-24 1989-06-19 Magneto-optical recording apparatus
EP93111526.5 Division-Into 1993-07-19

Publications (3)

Publication Number Publication Date
EP0392020A1 EP0392020A1 (en) 1990-10-17
EP0392020A4 true EP0392020A4 (en) 1992-09-02
EP0392020B1 EP0392020B1 (en) 1994-08-24

Family

ID=26485080

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93111526A Expired - Lifetime EP0569054B1 (en) 1988-06-24 1989-06-19 Magneto-optical recording apparatus
EP89907287A Expired - Lifetime EP0392020B1 (en) 1988-06-24 1989-06-19 Magnetooptical recording apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP93111526A Expired - Lifetime EP0569054B1 (en) 1988-06-24 1989-06-19 Magneto-optical recording apparatus

Country Status (7)

Country Link
US (1) US5182734A (en)
EP (2) EP0569054B1 (en)
JP (1) JP2847722B2 (en)
KR (1) KR0136709B1 (en)
AT (2) ATE136678T1 (en)
DE (2) DE68926252T2 (en)
WO (1) WO1989012889A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2576643B2 (en) * 1989-11-14 1997-01-29 三菱電機株式会社 Magneto-optical recording device
US5537379A (en) 1991-05-10 1996-07-16 Discovision Associates Optical data storage and retrieval system and method
US5345435A (en) * 1991-08-30 1994-09-06 Sony Corporation Optical disc and method for recording on optical disc
GB2260019A (en) * 1991-09-27 1993-03-31 Nsk Ltd Optical disk drive and read/write apparatus
CN1075024A (en) * 1992-01-29 1993-08-04 松下电器产业株式会社 Recording/displaying device
US5450381A (en) * 1992-07-07 1995-09-12 Sony Corporation Magneto-optical recording utilizing signal phase adjustment
JPH06309672A (en) * 1993-04-26 1994-11-04 Sony Corp Optical disk recording medium and optical disk device
US6122126A (en) * 1993-08-03 2000-09-19 Sony Corporation Digital magnetic reproducing apparatus and digital magnetic recording/reproducing apparatus employing detection of second harmonic distortion and bias current control
US5793723A (en) * 1995-06-14 1998-08-11 Nikon Corporation Method and a system for adjusting optical recording device involving an optical recording medium of non-uniform heat characteristics
US5742566A (en) * 1995-11-27 1998-04-21 Sony Corporation Optical recording methods and apparatus using light modulation technique based on detecting temperature of the medium
US6278667B1 (en) * 1998-01-30 2001-08-21 Seagate Technology, Inc. System and method for light power control in a magneto-optical drive
JPH11345439A (en) * 1998-03-31 1999-12-14 Hitachi Maxell Ltd Magneto-optical recording medium, and method and apparatus for recording and reproducing
JP2000331394A (en) * 1999-05-14 2000-11-30 Sanyo Electric Co Ltd Magneto-optical recording method and magneto-optical recording device
JP4157254B2 (en) * 2000-06-14 2008-10-01 シャープ株式会社 Information recording / reproducing apparatus and tracking servo method thereof
JP2004265463A (en) * 2003-01-31 2004-09-24 Sony Corp Data recorder, data recording method and program

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001093A1 (en) * 1986-07-31 1988-02-11 Sony Corporation Ferromagnetic recording apparatus

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5981671A (en) * 1982-11-01 1984-05-11 Ricoh Co Ltd Magnetic recording medium
JPS61214266A (en) * 1985-03-20 1986-09-24 Hitachi Ltd Photomagnetic recording and reproducing device
JPH0756708B2 (en) * 1985-04-19 1995-06-14 三洋電機株式会社 Magneto-optical disk and its recording device
JPS61276103A (en) * 1985-05-31 1986-12-06 Canon Inc Recording system for photomagnetic memory
JPS62154250A (en) * 1985-12-25 1987-07-09 Seiko Epson Corp Photomagnetic recording device
JPH071562B2 (en) * 1986-06-02 1995-01-11 日本放送協会 Recording method for magneto-optical disk
JPS63108539A (en) * 1986-10-27 1988-05-13 Seiko Epson Corp Optical information recording and reproducing device
JPS63241740A (en) * 1987-03-27 1988-10-07 Seiko Epson Corp Recording method for magneto-optical recording and reproducing device
JP2576521B2 (en) * 1987-08-03 1997-01-29 ブラザー工業株式会社 Magneto-optical disk drive
JP2691900B2 (en) * 1987-10-26 1997-12-17 株式会社ニコン Recording method
US4991158A (en) * 1988-03-11 1991-02-05 Mitsubishi Denki Kabushiki Kaisha Optical information recording and reproducing apparatus
EP0387052B1 (en) * 1989-03-09 1995-09-20 Canon Kabushiki Kaisha Magneto-optical recording apparatus having means for delaying an input signal for preventing bit shift
JP3469432B2 (en) * 1997-06-24 2003-11-25 住友ベークライト株式会社 Conductive resin paste and semiconductor device manufactured using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001093A1 (en) * 1986-07-31 1988-02-11 Sony Corporation Ferromagnetic recording apparatus

Also Published As

Publication number Publication date
KR900702521A (en) 1990-12-07
EP0392020B1 (en) 1994-08-24
EP0569054A3 (en) 1993-12-22
JPH02126447A (en) 1990-05-15
US5182734A (en) 1993-01-26
DE68917715T2 (en) 1995-01-12
WO1989012889A1 (en) 1989-12-28
ATE110486T1 (en) 1994-09-15
EP0392020A1 (en) 1990-10-17
DE68926252T2 (en) 1996-08-22
EP0569054A2 (en) 1993-11-10
DE68917715D1 (en) 1994-09-29
JP2847722B2 (en) 1999-01-20
ATE136678T1 (en) 1996-04-15
KR0136709B1 (en) 1998-04-24
EP0569054B1 (en) 1996-04-10
DE68926252D1 (en) 1996-05-15

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